Optical waveguides – Temporal optical modulation within an optical waveguide – Electro-optic
Patent
1995-07-27
1997-07-01
Bovernick, Rodney B.
Optical waveguides
Temporal optical modulation within an optical waveguide
Electro-optic
385 1, 385 2, 359238, 359239, G02F 1035
Patent
active
056446659
ABSTRACT:
An optical link is disclosed that is operated by a balanced detection technique so as to extend its linear dynamic range, yet substantially eliminate even-order harmonic distortion of the modulated signal. The modulator comprises two parallel arranged Mach-Zehnder interferometers that respectively have a steady state DC voltage bias applied so that the operating points of the Mach-Zehnder interferometers are selected to produce two separate modulated signals, one of which is later phase shifted by a phase shift device so as to provide an output that is combined with the other modulated signal in such a manner so as to cause a subtraction, leaving the final output signal substantially free of any unwanted even-order harmonic components in order to provide for a multi-octave response characteristic.
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M.L. Farwell et al, "Increased Linear dynamic range by low biasing the MaZender modulator", IEEE Photonics Tech. Lett. vol. 5, 779, 1993. No months available.
E. Ackerman, et al, "Maximum dynamic range operation of a microwave external modulation fiber-optic link", IEEE Trans. MTT, vol. 41, 1299, 1993. No months available.
Burns William K.
Gopalakrishnan Ganesh K.
Moeller Robert P.
Bovernick Rodney B.
McDonnell Thomas E.
Sanghavi Hemang
The United States of America as represented by the Secretary of
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